Radioantenna



i. Wi. BRENNER RADIOANTENNA Filed Nov. 2, 19275 lily 1.

5 Sheets-Sheet 2 TQEQ INVENTOR [5i-:fome ZreI/Lner ATTORNEY 5. M. wmimmfz RADIOANTENNA Filed Nov'. 2r i923 3 Sheets-Sheet 5 v BY , ATTORNEY Wire, taut and ander a proper ten-slim pro'- pose to provide a spring tension at the ends of the cross bars l, l. This ma] be aceomplislied in various Ways and 'l have shown a housing 18 comprising a cover 18 and a base 18 Collapsible therein and held apart by any suitable elastic menne sae-h as lielieal springs 19. 'lo prevent the sep:V tion ol ooi/er i8' and base lil, and to lnxit the amount of play between the two, l secure the base lil to 'the cover by moans of. bolts 2O operai/infA in slots 2l oi base lli. Boiled to cover 18' are triangular bloolis 9.2 oi" wood, hard rubber or other suitable material having grooves '25 out in the. apex to reoeivei-Wires and maintain them in their proper relationship.

ln the moditied. form ot control switch shown in Figure 5, il propose, to empi" sliding Contact arno 2li, having indicar 3 marks 'thereon t' desigiiate which loop binding post 5 'the Contact is in connection with.

in the modified of control switch sliiown in Figures 6 and 7, l propose to provide a rotatable drain 25 having a helical Contact 26 which, as the. drum is rotated, Gomes into Contact Vith dill'erent binding' posts 5", depending' upon the degree and direction of rotation. Ar dial 27 carried by the drinn 25 indicates which loop is connected.

The operation of tlieideviee is very slur ple. The lead 'Wire fl 'ironi the loop antenna is Seonred to the antenna. post A. olf the oeiying set and the lead Wire 8 4from the switch is secured to the ground post of the receiving set. The Vframe carrying the loops is then rotated in its base 3 in the direction ot 'the signals, it the direction of' the particular station is known and then the. set is 'tuned in 'and the switch fi' olf the sel adjusted to give the proper length to seizure the clearest and best reoeption.

Various modifications oit construction inielit be made and still fall within the seope of my invention, and l have shown ,several suoli modifications.

l.' claim:

l. A .loop aerial comprising a frame of substantially radial arms, wire supports Lasagne located substantially at the ends oi' the arms, Said Supports including dieleelrir malerial and Wire-spacing means, loop wire encircling the supports and retained by ilie spaeing means, and resilient means 'acting between a plurality of tbe arms and llie respeclii'e wire supports to urge the Supports out-- ward and tension thel loop wire.

A loop antenna comprising a base, a standard rotatably mounted thereon, a

Switch box on the standard, a loop frame, yg

consisting of a plurality bof substantially radial arms` one oi' which is mounted on the switch box, Wire supports located eubsi'an- 'tially at "the ends of certain o'l` the arms` and including insulating material havingwirespaeing n'ieans, an antenna consisting ol a plurality of wire loops passing about said supports, metal ront-act meml'iers in :he switch box providing' additional supports and eirouit contactsA ior the loop wires, and a movable element having an Ie' \'ternally an oessiblo handle for controling the loop eireuit.

ll. [i loop antenna. con'iprising` a base, a standard rotatably mounted thereon, a switch box on the sia'fiidard, a loop frame consisting oit a. plurality oi' substantially radial arms, one of which is mounted on tlie switch bor, wire supports located substan; tially at the ends of certain of the arms 'and including` insulating material having Wirespaeing means, resilient means acting be tween the arms and the wire supports to urge tlie latter yieldingly outward, an antenna consisting' ol a plurality ol" wire loops passing about said supports and tensioned by theni, metal rontaet members iu the switch box providing` additional supports and circuit contacts lor the loop wires.y and a movable eleinent having an externally arcessible handle 'for controlling the loop eircuit. y

5. ln a loop automi/a llie rombiualion with a frame arm ol a cross-piece ol' insulating' material located substaniially at the end oi lille arm, Wire-retaining' and spacing meansv 'thereon to bold and space a plurality ol loop turns, a member on ille arm morably supporting' the cross-piece, and a plurality of springs in spared relaliou lenlgtliu'se ol` (be rroswpieee and acting between ille l'rauw and llie moss-pieve to urge i'lio latter yieldinaly outward ai a plurality ol' pointy"y and apply tension lo tbe loop wires.

Sigurd at New vroi-li, in ille county ol' New loi-li and Stato oi Non' York, this Qfllli day ol' Oct-ober, 1923.

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